Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/10/05 06:30 | Yann Wojcik v Nikola Kolyachev | 7-6,6-4 |
| ITF M15 Sozopol | 2021/09/13 07:00 | Plamen Milushev v Nikola Kolyachev | 6-4,6-3 |
| ITF M25 Pitești | 2021/08/02 06:00 | Nikola Kolyachev v Cosmin Ontica | 7-5,0-6,4-10 |
| ITF M15 Sofia | 2021/07/05 07:00 | Franco Roncadelli v Nikola Kolyachev | 6-4,6-1 |
| ITF M15 Sofia | 2021/07/04 07:30 | Nikola Kolyachev v Francisco Llanes | 6-2,6-7,10-1 |
| ITF M15 Sozopol | 2021/10/06 10:50 | Ilya Snitari v Berk Ilkel | 3-6,6-4,6-0 |
| ITF M15 Sozopol | 2021/10/05 06:30 | Berk Ilkel v Plamen Milushev | 6-3,7-5 |
| ITF M15 Sozopol | 2021/10/03 09:00 | Berk Ilkel v Enes Donmezer | 3-6,7-6,10-7 |
| Challenger - Istanbul | 2021/09/12 09:50 | Berk Ilkel v Alexander Shevchenko | 1-6,3-6 |
| ITF M15 Novi Sad | 2021/08/02 08:00 | Berk Ilkel v Milan Drinic | 2-6,1-6 |
| ITF M15 Novi Sad | 2021/07/25 12:00 | Aleksa Mardjonovic v Berk Ilkel | 6-2,7-5 |
| ITF M15 Monastir | 2021/06/27 09:00 | Berk Ilkel v Brandon Lam | 6-2,6-7,5-10 |
| ITF M15 Monastir | 2021/06/20 08:00 | Takashi Saito v Berk Ilkel | 6-2,6-3 |